VP1006-200PM-00 OEM ISO Reader Manual version 2.6 / Page 10
Antenna tuning with option “AA”
With HF menu option “Adjust Antenna (AA)”, it is possible to see the antenna tuning on the display.
The highest display value is the optimum adjustment.
How to tune
1. Select option “AA” on the display and press the button until the display starts to blink. A value
will now appear on the display.
2. Now turn the antenna trimmer slowly (on the antenna). The display value will change. If the
value is going down, turn the other way. Turn till the maximum display value is found.
Neutrodynisation between two antennas
Two large antennas can have coupling with antenna fields. Result : tag is identified in both antennas. A
solution is to install a neutrodynisation unit to reduce cross talk caused by antenna coupling.
How to tune
1. Set reader A in neutro transmit mode (HF menu option nc - nt).
2. Set reader B in neutro receive mode
(HF menu option nc - nr)
3. Turn the wheels apart to the highest display value at reader B
The display value and wheel distance apart can vary. Low display value means usually low coupling.
Always use a sync cable between the readers. It is used during normal operation and also used for the
tuning to switch of transmitter of the receive unit. If one unit is set to neutro transmit, it will switch off all
other readers connected to the same sync cable.
Antenna tuning visible by a light
With HF menu option “Adjust Antenna (AA)” output 6 is also switched on. By connecting a light to
output 6 the status during tuning can be monitored. When the light is blinking it is indicating the
optimum adjustment point and is corresponding with the highest display value.
6.3 Identification test options
Identification test with option “id”
When a tag is in the antenna field, the green LED used for the antenna tuning will be blinking. There is
also a test in the internal test menu called “id”. This test will also show the green LED blinking but also
shows the last two digits of the tag number on the display.
Signal level indication option “SF” and “SH”
There is a test available to give an indication about the signal received on the reader of the VP1006.
This test is separated in a FDX (SF) and HDX (SH) noise indication test. This test is mainly used for
HDX because at HDX there is a greater risk of external influence on the antenna field.
How to use the signal level test
1. Select option “SH” on the display and press the button until the display starts to blink. A value
will appear on the display.
2. Now move a HDX tag slowly into the antenna field. The display value will normally increase
when getting closer to the antenna. If there is negligible or little increase in display value this is
an indication something external is causing noise.
The possible cause of noise can be frequency controlled electric motors or a transmitter operating on
or close to 134.2 kHz
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